<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<link rel="STYLESHEET" href="lib.css" type='text/css' />
<link rel="SHORTCUT ICON" href="../icons/pyfav.png" type="image/png" />
<link rel='start' href='../index.html' title='Python documentation Index' />
<link rel="first" href="lib.html" title='Python library Reference' />
<link rel='contents' href='contents.html' title="Contents" />
<link rel='index' href='genindex.html' title='Index' />
<link rel='last' href='about.html' title='About this document...' />
<link rel='help' href='about.html' title='About this document...' />
<link rel="next" href="node698.html" />
<link rel="prev" href="node696.html" />
<link rel="parent" href="node692.html" />
<link rel="next" href="node698.html" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name='aesop' content='information' />
<title>20.1.6.5 The Window Manager</title>
</head>
<body>
<div class="navigation">
<div id='top-navigation-panel' xml:id='top-navigation-panel'>
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td class='online-navigation'><a rel="prev" title="20.1.6.4 coupling Widget Variables"
  href="node696.html"><img src='../icons/previous.png'
  border='0' height='32'  alt='Previous Page' width='32' /></a></td>
<td class='online-navigation'><a rel="parent" title="20.1.6 handy Reference"
  href="node692.html"><img src='../icons/up.png'
  border='0' height='32'  alt='Up one Level' width='32' /></a></td>
<td class='online-navigation'><a rel="next" title="20.1.6.6 tk Option Data"
  href="node698.html"><img src='../icons/next.png'
  border='0' height='32'  alt='Next Page' width='32' /></a></td>
<td align="center" width="100%">Python Library Reference</td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
  href="contents.html"><img src='../icons/contents.png'
  border='0' height='32'  alt='Contents' width='32' /></a></td>
<td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png'
  border='0' height='32'  alt='Module Index' width='32' /></a></td>
<td class='online-navigation'><a rel="index" title="Index"
  href="genindex.html"><img src='../icons/index.png'
  border='0' height='32'  alt='Index' width='32' /></a></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="node696.html">20.1.6.4 Coupling Widget Variables</a>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" href="node692.html">20.1.6 Handy Reference</a>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" href="node698.html">20.1.6.6 Tk Option Data</a>
</div>
<hr /></div>
</div>
<!--End of Navigation Panel-->

<h3><a name="SECTION0022165000000000000000">
20.1.6.5 The Window Manager</a>
</h3> <a id='l2h-4704' xml:id='l2h-4704'></a>

<p>
In Tk, there is a utility command, <code>wm</code>, for interacting with the
window manager.  Options to the <code>wm</code> command allow you to control
things like titles, placement, icon bitmaps, and the like.  In
<tt class="module"><a href="module-Tkinter.html">Tkinter</a></tt>, these commands have been implemented as methods
on the <tt class="class">Wm</tt> class.  Toplevel widgets are subclassed from the
<tt class="class">Wm</tt> class, and so can call the <tt class="class">Wm</tt> methods directly.

<p>
To get at the toplevel window that contains a given widget, you can
often just refer to the widget's master.  Of course if the widget has
been packed inside of a frame, the master won't represent a toplevel
window.  To get at the toplevel window that contains an arbitrary
widget, you can call the <tt class="method">_root()</tt> method.  This
method begins with an underscore to denote the fact that this function
is part of the implementation, and not an interface to Tk functionality.

<p>
Here are some examples of typical usage:

<p>
<div class="verbatim"><pre>
from Tkinter import *
class App(Frame):
    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.pack()


# create the application
myapp = App()

#
# here are method calls to the window manager class
#
myapp.master.title("My Do-Nothing Application")
myapp.master.maxsize(1000, 400)

# start the program
myapp.mainloop()
</pre></div>

<p>

<div class="navigation">
<div class='online-navigation'>
<p></p><hr />
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td class='online-navigation'><a rel="prev" title="20.1.6.4 coupling Widget Variables"
  href="node696.html"><img src='../icons/previous.png'
  border='0' height='32'  alt='Previous Page' width='32' /></a></td>
<td class='online-navigation'><a rel="parent" title="20.1.6 handy Reference"
  href="node692.html"><img src='../icons/up.png'
  border='0' height='32'  alt='Up one Level' width='32' /></a></td>
<td class='online-navigation'><a rel="next" title="20.1.6.6 tk Option Data"
  href="node698.html"><img src='../icons/next.png'
  border='0' height='32'  alt='Next Page' width='32' /></a></td>
<td align="center" width="100%">Python Library Reference</td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
  href="contents.html"><img src='../icons/contents.png'
  border='0' height='32'  alt='Contents' width='32' /></a></td>
<td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png'
  border='0' height='32'  alt='Module Index' width='32' /></a></td>
<td class='online-navigation'><a rel="index" title="Index"
  href="genindex.html"><img src='../icons/index.png'
  border='0' height='32'  alt='Index' width='32' /></a></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="node696.html">20.1.6.4 Coupling Widget Variables</a>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" href="node692.html">20.1.6 Handy Reference</a>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" href="node698.html">20.1.6.6 Tk Option Data</a>
</div>
</div>
<hr />
<span class="release-info">Release 2.5.1, documentation updated on 18th April, 2007.</span>
</div>
<!--End of Navigation Panel-->
<address>
See <i><a href="about.html">About this document...</a></i> for information on suggesting changes.
</address>
</body>
</html>
